Are malware programs that hide their true nature, and reveal their designed behavior only when activated

Trojan horses

Explanation:

At first, a Trojan horse might appear harmless and legitimate but end up being as destructive as any other malware out there. When a user maliciously downloads a program that claims to protect his computer against viruses but instead introduces them is an example of a Trojan horse. Before it is introduced into the system, the Trojan horse tricks the user into executing the malware. Once it is loaded, this malware will perform malicious actions that it was programmed to perform.

b. related objects

explanation:

data is stored in related objects in an access database.

solution:

this situation is called an ip conflict.

data from a server is sent in small bits called packets. in an ip conflict, some packets will end up in one computer while some other packets will end up in another computer.

so…overall none of the computers get the data as the original message or picture being sent by the server cannot be retrieved with only half the packets. so it will show up as an error.

thus the final answer is d.